Ask Kim, Khloe and Kourtney Kardashian, Ashley Graham, Nicole Scherzinger and GRAZIA cover girl Olivia Culpo who does their hair, and they all have the same answer. Justine Marjan. The go-to stylist for Hollywood’s brightest stars, when a red carpet calls, Marjan is their girl.

Be it the wet waves of Khloe, the intricate braids of Scherzinger or Culpo’s glamorous bob – Marjan is the genius behind the hairstyles we love (and bookmark). For the TRESemmé Ambassador and celebrity stylist, good hair means confidence, something she believes in strongly. “When your hair is great, you feel great and you put your best self forward.”

In an Australian exclusive, GRAZIA speaks to Justine Marjan about the transformative power of hair, her go-to look and the product she can’t live without (hint: she uses it for EVERYTHING).

What excites  you most about hair, and why hair?
I love that it can complete transform someone’s image. It’s so fun to have control over how someone portrays and presents themselves to the world.

What is your current favourite hairstyle – and how do you achieve it?
My current favourite hairstyle is a sleek high ponytail! I get the look by brushing the hair up into a sleek ponytail by using a smoothing brush and TRESemmé Salon Finish Extra Hold Hairspray, then attaching a Hidden Crown Headband style extension around the base of the ponytail for added length and fullness.

What’s your take on this “lived in” hair trend that persists? And hair trends in general?
I love it! I love all hair trends, as long as people remember that they don’t have to do something just because it is or isn’t trendy. What’s most important is finding out what makes you look and feel your best, whether it’s on trend or not.

Hair has an unbelievably transformative power – it can change not only your look, but your mood in one slick or slip, for example Kim’s baby pink hair – do you believe hair can transform someone and how?
Yes, it is amazing how someone could not be feeling great when they sit down to get their hair done, but by the time it is finished they have a renewed sense of confidence. When your hair is great, you feel great and you put your best self forward. Confidence really is key in everything.

What is your favourite hairstyle/s you have ever done, and on who?
One of my favourite looks every was Olivia Culpo for the Golden Globes a few years back. We did a really intricate Frida Kahlo Spanish inspired braided up ‘do with a middle part that was just so stunning and brought the whole look to life.

How have you seen hair evolve over time, and what’s been your favourite and least favourite time in hair?
Hair, like fashion, is cyclical, so trends usually come and go in cycles. I love that right now everything is in fashion! We’re seeing 80’s big curls and volume, 60’s bobs, 90’s sleek strands and up-dos, etc. I’m super inspired by the early 90’s right now. I love the way girls wore hats, had face framing tendrils, super cute short haircuts, and spiky up-dos.

What is the signature Justine Marjan style and how do we do it?
My signature style is probably the flat iron wave. I do this by creating an S-wave pattern with my ghd Platinum Plus Styler on 1-Inch sections of hair. As I work the iron down each hair strand, I twist it towards or away from the face, creating a c shape, then immediately work it in the other direction. When I get to the bottom, I run the iron down the ends so they are straight. To finish, spray roots with TRESsemmé Dry Shampoo and massage in, then mist TRESemmé Salon Finish Extra Hold Hairspray through ends for hold and texture.

You’re the TRESemmé Ambassador, and much of the TRESemmé collection seems to focus on the effortlessness of hair – drying styling products like Hair Spray, Pre-Styling Spray and Dry Shampoo – what is your ultimate tip with it comes to dry styling?
I always prep the hair with a hairspray like TRESemmé Salon Finish Extra Hold Hairspray then use my hot tools, so that the hair has hold while I’m working with it. When I’m done, I like to spray a little TRESemmé Dry Shampoo at the roots to add volume.

What is the one product you can’t live without and why?
Hairspray! It’s my ride-or-die product! I could literally use it for any look! I’ll spray directly on my brush and work through hair for a shiny, smooth finish, or I can spray directly on roots and brush into an up ‘do for a sleek look. I can finish textured waves with it for added definition or I can use it to finish and lock in a style!

Finally, you’re throwing the ultimate TRESemmé slumber party in New York. Who do you invite, and why? Where is it? What do you do? And of course, how do you wear your hair?
That sounds so fun!! I would hold it at the Plaza Hotel, invite you, we have a braid train, and watch ’90s rom coms all night!